154a1a02bf
Use script and some manual fixup to fix directores names in include guards. Reviewed-by: lfoltan, eosterlund, kbarrett
127 lines
4.9 KiB
C++
127 lines
4.9 KiB
C++
/*
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_GC_G1_G1COLLECTORSTATE_HPP
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#define SHARE_GC_G1_G1COLLECTORSTATE_HPP
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#include "gc/g1/g1YCTypes.hpp"
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#include "utilities/globalDefinitions.hpp"
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// State of the G1 collection.
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class G1CollectorState {
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// Indicates whether we are in the phase where we do partial gcs that only contain
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// the young generation. Not set while _in_full_gc is set.
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bool _in_young_only_phase;
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// Indicates whether we are in the last young gc before the mixed gc phase. This GC
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// is required to keep pause time requirements.
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bool _in_young_gc_before_mixed;
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// If _initiate_conc_mark_if_possible is set at the beginning of a
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// pause, it is a suggestion that the pause should start a marking
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// cycle by doing the initial-mark work. However, it is possible
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// that the concurrent marking thread is still finishing up the
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// previous marking cycle (e.g., clearing the next marking
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// bitmap). If that is the case we cannot start a new cycle and
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// we'll have to wait for the concurrent marking thread to finish
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// what it is doing. In this case we will postpone the marking cycle
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// initiation decision for the next pause. When we eventually decide
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// to start a cycle, we will set _in_initial_mark_gc which
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// will stay true until the end of the initial-mark pause doing the
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// initial-mark work.
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volatile bool _in_initial_mark_gc;
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// At the end of a pause we check the heap occupancy and we decide
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// whether we will start a marking cycle during the next pause. If
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// we decide that we want to do that, set this parameter. This parameter will
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// stay set until the beginning of a subsequent pause (not necessarily
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// the next one) when we decide that we will indeed start a marking cycle and
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// do the initial-mark work.
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volatile bool _initiate_conc_mark_if_possible;
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// Marking or rebuilding remembered set work is in progress. Set from the end
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// of the initial mark pause to the end of the Cleanup pause.
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bool _mark_or_rebuild_in_progress;
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// The next bitmap is currently being cleared or about to be cleared. TAMS and bitmap
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// may be out of sync.
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bool _clearing_next_bitmap;
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// Set during a full gc pause.
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bool _in_full_gc;
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public:
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G1CollectorState() :
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_in_young_only_phase(true),
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_in_young_gc_before_mixed(false),
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_in_initial_mark_gc(false),
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_initiate_conc_mark_if_possible(false),
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_mark_or_rebuild_in_progress(false),
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_clearing_next_bitmap(false),
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_in_full_gc(false) { }
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// Phase setters
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void set_in_young_only_phase(bool v) { _in_young_only_phase = v; }
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// Pause setters
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void set_in_young_gc_before_mixed(bool v) { _in_young_gc_before_mixed = v; }
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void set_in_initial_mark_gc(bool v) { _in_initial_mark_gc = v; }
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void set_in_full_gc(bool v) { _in_full_gc = v; }
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void set_initiate_conc_mark_if_possible(bool v) { _initiate_conc_mark_if_possible = v; }
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void set_mark_or_rebuild_in_progress(bool v) { _mark_or_rebuild_in_progress = v; }
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void set_clearing_next_bitmap(bool v) { _clearing_next_bitmap = v; }
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// Phase getters
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bool in_young_only_phase() const { return _in_young_only_phase && !_in_full_gc; }
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bool in_mixed_phase() const { return !in_young_only_phase() && !_in_full_gc; }
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// Specific pauses
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bool in_young_gc_before_mixed() const { return _in_young_gc_before_mixed; }
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bool in_full_gc() const { return _in_full_gc; }
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bool in_initial_mark_gc() const { return _in_initial_mark_gc; }
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bool initiate_conc_mark_if_possible() const { return _initiate_conc_mark_if_possible; }
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bool mark_or_rebuild_in_progress() const { return _mark_or_rebuild_in_progress; }
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bool clearing_next_bitmap() const { return _clearing_next_bitmap; }
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G1YCType yc_type() const {
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if (in_initial_mark_gc()) {
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return InitialMark;
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} else if (mark_or_rebuild_in_progress()) {
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return DuringMarkOrRebuild;
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} else if (in_young_only_phase()) {
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return Normal;
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} else {
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return Mixed;
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}
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}
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};
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#endif // SHARE_GC_G1_G1COLLECTORSTATE_HPP
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